Update Loader.js

Changes 1 KB = 1000 B to 1024 KB = 1024 B
Adding boolean attribute "transparent" for files with transparency. 

http://stackoverflow.com/questions/18444939/define-transparent-material-in-json-model-format-3-1
Fixed bugs in Shape.Utils.triangulateShape

Fixed issues in the triangulateShape method (a for..in loop was used where a sequential for loop is required). 
A for..in loop should be avoided when using array like objects, because it also enumerates inherited properties and iteration order is not guaranteed.
This makes sure that the lights are counted correctly based on their visibility. This fixes #4439.
Update CubeGeometry.js

warning the user
fixes #3773
Update Animation.html
Merge branch 'dev' of https://github.com/gero3/three.js into dev
Merge branch 'patch-1' of https://github.com/gero3/three.js into dev
r67dev
Updated builds.
Added max( value, 0.0 ) to schlick computation. Should fix #4366 and #4454.
Updated builds.
Merge branch 'master' of https://github.com/vandixhoorn/three.js into dev
Fixed global hl and minor clean up.
Updated builds.
Replaces Catmull-Clark Algorithm with Loop Scheme for Subdivision Modifier

- This provides better results for subdivisions of triangles only
- Subdivision examples looks much better now
- Fixes #4455, #3663
- Known issues: doesnt handle UVs, sharp, and semi-sharp edges for now
Subdivision Modifier: More formatting to mrdoob's code style
Fix some issues with THREE.Animation
Merge branch 'dev' of https://github.com/gero3/three.js into dev